Steam-boiler



(No Model.) I 2 sheets -sheet 1. G. KELLY.

Steam Boiler.

No. 234,986. Patented Nov. 30,1880.

IJV'VENTOR,

' 2 Sheets-Sheet 2.

G. KELLY.

(No Model.) 7

Steam Boiler,

Patent ed Nov. 30,1880.

M b o F D M INVENTOR.

WITNESSES.

NITE STATES A'IENT tries,

GEORGE KELLY, OF CHICAGO, ILLINOIS.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 234,986, dated November 30, 1880. Application filed April 17, 1880. (No model.)

To all whom it may concern Be it known that I, GEORGE KELLY, of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvementsin Compound Steam-Boilers, of which the following is a specification.

The object of my invention is to produce a steam boiler which shall produce a drier quality or greater amount of steam in proportion to the fuel consumed than those of ordinaryconstruction. Thisobjectisaccomplished by partially surrounding the ordinary cylindrical boiler with other or supplemental boilers, as shown, in such relation to the first named that the greater part of the heat generated may act also upon said supplemental boilers, and they are thus operated without any additional expenditure in the way of fuel.

My invention therefore consists of a compound boiler composed of an ordinary cylindrical boiler, partly surrounded by supplemental boilers in close relation, and in the peculiar formation of such supplemental boilers as will accomplish my object. This formation is also such that it occupies no space that could ordinarily be utilized in any other manner.

Reference is had to the accompanying drawings, forming part hereof, of which Figure 1 is a front elevation of a boiler embodying my invention; Fig. 2, a longitudinal vertical section on the dotted line 00 m. Fig. 3 is a transverse vertical section on the line y 3 Fig. 4: is a transverse vertical section on the dotted line 2 z, and Fig. 5 a view similar to Fig. at of an alternate construction, showing how my improvements are applied to old boilers, or to boilers where they are only desired for superheating purposes.

In said drawings, the portions marked A represent the ordinary brick-work in which boilers are mounted; B, the fire -box, having gate-bars b b therein; C, the ordinary cylindrical tubular boiler, having tubes 0 c; D, the passage-way between the boilers from the firebox; E F, the supplemental boilers, arranged on each side of the main boiler with only a small space intervening, and provided with tubes 6 f G, a space behind the boiler-O, which isin effect a continuation of the passage-wayD H, an inclosed space above the tire-box, in front of the boiler C and the supplemental boiler E; I, a space alongside the space H, in front of the supplemental boiler F; J, a dividing-wall between the spaces H and l; K, a smoke-space above the boilers, leading rearwardly over the boiler E and forwardly over the boiler F to the smoke-stack K L M N, steam-domes to the boilers C E F, respectively, and which are connected by pipes O P; Q, a supply-pipe having branches g g g by which the boilers are fed with water in case each is used as a separate water-boiler; R, a cock by which the steam is admitted to the supplemental boilers from the regular boiler when the former are used as superheaters; S, an open space between the main boiler and the supplemental boiler, into which the heat freely enters, but in which there is intended to be no draft, and T, a similar space between the supplemental boilers and the brick wall A.

In operation the heat passes from the firebox B along the passage D G and back through the fines c 0 in the boiler'C, in the manner of ordinary boilers. It then passes through the fines c in the boiler E and back through the fluesfin the boiler F, and then over the boiler E and back over the boiler F th rough the spaces K K to the smoke-stack K.

It will bereadily understood that this arran gement of boilers utilizes the heat to a far greater extent than in the ordinary single boiler, while the space occupied is but little if any greater.

When the supplemental boilers are used for superheating or drying the steam generated in the central boiler, (which is the principal purpose for which I have designed them,) it is only necessary to use the upper halves thereof, as shown in part of Fig. 5, and therefore in many cases the lower halves will probably be omitted.

It is obviously necessary to construct these supplemental boilers ofupperand lowerhalves, as shown in part of Fig. 5, when they are applied to boilers already set, as it would be very difficult to place such ones as are shown in Fig. 4 in position to operate without tearing down the brick-work.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is

1. A compound steamboiler composed of the main boiler G and the supplemental boilparts consecutively on its way to the smokestack, all substantially as set forth.

In Witness whereof I have hereunto set my hand and seal at Chicago, Illinois this 8th 5 ers E F, constructed in the manner shown and day of April, A. D. 1880.

arranged and operating substantially as set forth.

2. A steam-boiler constructed as shown, and

provided with flues and tubes, so that the heat 10 and smoke may pass through each of several GEORGE KELLY.

In presence of- BIoN A. DODGE, LEWIS L. W001). 

